code: def not_(a):
      """Functional form of "not"."""
      if hooks._DISPATCH.detect_overload_not_(a):
          return hooks._DISPATCH.not_(a)
      return _py_not(a)
  
file_path: DALI/dali/python/nvidia/dali/_autograph/operators/logical.py
imports: from nvidia.dali._autograph.utils import hooks
label_desc: Use image node_id 1 for calling a global function with example usage: not_(a) and returns: _py_not, hooks